Is the landing page where the link resides a Marketo landing page? If so, you would reference the asset name, not the actual URL. As far as the link name, if it is a Marketo landing page then you should be able to grab it off the asset.
If the link resides on a non-Mkto landing page, then you may want to change your approach. You can use the "Visits Web Page" filter and utilize the "Referrer" constraint. I have not had much experience with this, but another approach you can try.
But if the link resides on your website, regardless of whether it is a Mkto landing page or not, you should be able to search for the link. I have had issues in the past copying and pasting links. I usually try to search for it. Can take a bit depending on the amount of links you have, but it usually gets there.